# 构造文件
from flask import Flask
#from flask_script import Manager
from flask_bootstrap import Bootstrap
from flask_mail import Mail
from flask_moment import Moment
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_pagedown import PageDown
from .config import config

bootstrap = Bootstrap()
mail = Mail()
moment = Moment()
db = SQLAlchemy()
pagedown = PageDown()
login_manager = LoginManager()  # 初始化
login_manager.session_protection = 'Strong'
login_manager.login_view = 'auth.login'

# 工厂函数
def create_app(config_name):
    app = Flask(__name__)
    app.config.from_object(config[config_name])
    config[config_name].init_app(app)
    pagedown.init_app(app)
    bootstrap.init_app(app)
    login_manager.init_app(app)
    mail.init_app(app)
    moment.init_app(app)
    db.init_app(app)
    #db.app = app
    #db.create_all()

    from .main import main as main_blueprint
    app.register_blueprint(main_blueprint)

    from .auth import auth as auth_blueprint
    app.register_blueprint(auth_blueprint, url_prefix='/auth')  # url_prefix 可选参数
    return app
